Pencil



C. E. WEHN PENCIL Filed Feb. 19, 1929 IN VEN TOR. fia/@fev '231 m ATTORNEYS.

Patented Oct. 6, 1931 UNITED STATES PATENTl oFFlcE CHARLES E. WEHN, OFALAMEDA, CALIFORNIA, ASSIGNOR {F-LISTO PENCIL COR- PORATION, OF ALAMEDA,CALIFORNIA, A CORPORATION OF CALIFORNIA :PENCIL Application led February19, 1929. Serial No. 341,217.

lThis invention relates to mechanical penci s.

` The object of the present invention is to generally improve andsimplify the constructionand operation of pencils of the characterdescribed; to provide a struct-ure which permits reduction in the numberof parts employed; to provide a structure which permits materialreduction in the over all length, and furthermore, to provide astructure which will be rigidwand substantial and easy to operate. y

The pencil is shown by way of illustration in the accompanying drawingsin which: Fig. 1 is an exterior view of the pencil, Fig. 2 is Aa centrallongitudinal section, Fig. 3 is a view'of the slotted tube, togetherwith a portion of the mechanism carried thereby, 'Y I Fig. 4y is a sideelevation of the lead ejector. Referring to the drawings in detail,.particularly Fig. 3, A indicatesin general a tube constructed of asuitable material, such as brass or the like. One end'of the tube isprovided withy a longitudinal slot through its wall and extendingsubstantially half the vlength of the tube, such as shown at 2 whichfunctions yas a guide for a lead pusher which is slidable within thetube and is generally 39 indicated at 3. The other end' of the tubeindicated at 4, serves the function of receiving andsecuring the pencillead indicated at 5. The forward end of the tube is provided with asplit point 6, to frictionally retain the lead. 4The point is providedwith a shoulder 7 and this secures apencil point or head 8, as willhereinafter be described. AThe opposite end of the `tube is closed by acap 9, whichY is soldered, pinnedor otherwise secured asat 10. Anexteriorly threaded sleeve 11 is slidably mounted on the tube and thissleeve is perforated, as indicated at 12 to vreceive the anchor end 13of the lead pusher, indicated at 8,' `A` collar 14 is secured on thetube, and a sleeve -15 is journalled on the tube to freely rotate,l thissleeveY being interposed between .the collar 14 andthe head v8 of thepencil.

-By referring to .Figs.c1 and 2 it will be noted'that the tubeiA, the'end cap 9, the

sleeve 11, the collar 14 and the sleeve 15 are all enclosed by means ofanexterior tube or barrel section 16. VThis tube is secured to thesleeve 15 by pins 17, or otherwise and as the sleeve is freely rotatableon the tube A barrel 16 'will also be free to rotate. The barrel 16'isinteriorly threaded, as yshown at 18, the threads engaging the threadsofthe sleeve 11 so that when the barrel 16 is rotated the 'sleeve willbe advanced or retracted, as will hereinafter be described;

The barrel 16 serves several functions, to wit, that of enclosing a mainmechanism, secondly that of advancing or retracting the sleeve 11.,third that of forming a spare lead receiving chamber whichis indicatedat 19, and fourth, that of'supporting anend closure cap 20 and an eraser21.

` In actual operation, when the pencil is being constructedand'assembled, the 'point or head 8 is iirst slipped over the end of thetube A, until it assumes thedotted line position shown inFigfS. It ishere secured against the shoulder 7 of the point 6, either by beingpressed on or byy being cemented. When the head is in position sleeve 15is applied, collar 14 is'next applied andV secured either by pinning itto the tube- A, soldering or otherwise,lcare being taken howeverthat'sleeve 15 will be permitted to freely rotate.

The lead pusher is next insertedin the groove'd portion 2 andthe sleeve11 applied. Cap 9is then placed in position and pinned or otherwisesecured. This completes the assembling of'the-lmain operating partof themechanism, and this vassembly is clearly shown in Fig. 3.

After this assembly has beencompleted, it is only/necessary to apply'the exterior barrel 16. This is screwed over the sleeve, Aand when theforward end of the tubeis passed over the sleeve 15a-nd abuts the head 8it is secured'by pins 17 or the like. The assem- `tube, andE secondly itfunctions as a bottom section for the lead receiving chamber 194 vsowhile the eraser forms a Closure for the opposite end of the leadreceiving chamber. If the pencil is empty and it is desired to loa-d thesame, cap 20 and eraser 2l will be re moved so that one of the pencilleads mayT be taken out. After the lead is taken out, the eraser and capare replaced andthe barrel 1G is rotated until sleeve ll engages the cap9. lVhen the sleeve assumes this position pusher 3 is completelyretractedy and the lead may thus be inserted in the pointend, asindicated at 5. Reverse rotation of the barrel will feed the lead pusher3 forwardly, and thus advance the lead as required.

It should also be noted that the mechanism disclosedin this applicationpermits amaterial reduction in the overall length of pene cils of thischaracter; Thepresent,structure alsoy permits the formation ofalead'receiving chamberfsuch as shown at19. That may, of course, beentirely eliminated if desired, thus further reducing the length of "thepen'.-` cil.-

It should also be noted that the barrel '16' is supported at two points,first at its forward end where it is'secured to the sleevel 15, andsecondly at a point intermediateV its-ends, to wit by the cap 9. Thestructure is thusfrigid andfsubstantial, and itisI at the same time easyto'operate as the sleevefll and thepusher 3. may be advancedor'retracted' either by rotation of the 'head 8f or-tlie barrel. 16a.

lVhile certain: features of the presentinvention are more or-lessspeeiti'eallvfdescribed, I Wish it understood that"various;vehanges ma)ybe resortedztofwithirr'the scope of the appended' claims, similarly',ythat: thek materials and finishes of the several parts -emF ployed maybe such as themanufacturer may decide, or varying vconditions or;uses-may demand.`

Having thus described myfinvention, what I claim and desire to.seeurebivLetters Patentis:

1. A pencil ot thecharacterdescribed comprising a tube slotted at oneend: and' having a central passage formed: therethrough; in' communication with the slot, said central pas sage forming a receptacle for,af pencil lead, an exteriorlv threaded sleeve-sli'dablfv'mountedon thetube, a. pusherrod.: lyingl in the-cene tral passage having alateratextensionirextending through the slot, means connecting thepusherrod and the sleeve, said meanssecuring thesleeve and pusher rodagainst rotation, a head membersecuned on the tubea collar secured onthe tube and' spaced: from the head member, a second sleeve rotatableonthe tube and interposed between. the'head member and the collar` atubular barrel enclosing the rotatable sleeve, the collar, thefirstnamed sleeve, the tube and: the pusher rod, one end ofthe barrelyabutting the'head member, means securing the abutting end of -thebarrelto the rotatable sleeve, and threads formed on the inner surfaceof the barrel and engaging the first-named sleeve, whereby rotation ofthe barrel and the sleeve about the tube will impart longitudinalmovement to the nut and the pusher rod.

2. A-pencil of the character described comprising a .tube slotted at oneend and having a central passage formed therethrough in communicationwith the slot, said central passage forming Y- anA exteriorly threadedrre` ceptacle forapencil lead, asleeve slidably mounted on the tube, apusher rod lying in the central passage having a lateral extension eX-tending-through the slot, means connecting the pusher rod and thesleeve, said means securing/the sleeve and pusher rod against rotation,a head member secured on the tube, a collarsecu'red on the tube andrspaced from the'head member, a second sleeve rotatable on the tube-vand interposed betweenv thehead memberfand the` collar, a tubularbarrelv ene closing the rotatable sleeve, the collar, the firstmamedsleeve, the tubeandy-fthe pusher rod, one end ofthe barrel abuttingthe'head member,'means secu'ring'the abutting end of the barrel to thefrotatable sleeve, threads formed on the inner surface of the barrel andengagingr the nut, whereby rotation ofthe barrel andl the sleeveabouttheftube will impartv longitudinal movement to the irstnamed-sleeveand the pusherfrod, and a: cap secured on the inner end of thetube, saidcap together AWi th; the collar `limitinglongitudinal movement of thefirst-named slceveand the pusher rod 'with' relation to they tube,

3.' A pencil of the character described comprisinga tube slotted. at oneend 'and having a central passage formed therethrough-f in communicationwith'the groove, said central passage-forming an exteriorly' threadedreceptacle for a pencily lead, a sleeve slidabl'y mounted'- on the tube,a pusher rod lying inthe central passage havinga lateral extension ex.Ltending through ftheslot, means connecting the pusher rod'and'sai'dfsleeve, said means securingthe sleeve( `and ypusher rodagainst rotation, a head member secured onithe tube, a collar secured onthe tube and` spaced from the headmember, a second sleeve rotatable onthetube and 'interposed between the head member andthe collar, a tubularbarrel enclosing the-rotatable sleeve, the collar, the nut,.theltube andthe'pusher rod', one end of the barrel abutting the head member, meanssecuringsthe abutting end ofthe barrel'to the rotatable sleeve, threadsformed on the Vinner surface of thebarrel an'dengaging the nut, wherebyrotation of the barrel. and the sleeve about the tube willimpartlongitmdinal` movement tothe nut and the pusher rod, a cap securedvon the inner end of the: tube, sai-(leap together withthecollarilimiting longitudinal movement of the nut'and the pusher rodwith relation to the tube, a lead receiving; chamber formed in v thetubular barrel and a closure for said lead receiving chamber.

4. A lead controlling mechanism for a pencil of the character described,comprising a tube adapted to contain a lead, a `split tipY formedintegrally with said tube for frictionally retaining the lead, a headmember secured to the tube, a sleeve rotatably mounted on the tubeadjacent the head member, said sleeve being adapted to support arotatable pencil barrel, a collar adjacent said sleeve and fastened tosaid tube whereby longitudinal movement of the sleeve upon the tube isprevented, and means whereby rotation of the barrel with relation tosaid head member will cause the lead to be pushed outwardly from theltube.

5. A lead feeding mechanism for a pencil of the character describedcomprising a tube adapted to contain a lead and having a longitudinallyextending slot formed therein, said slot extending inwardly from one endsubstantially half the length of the tube, a push rod slidably carriedby the tube and having a lateral extension extending through the slot,an exteriorly threaded sleeve slidably mounted on the tube and connectedto said lateralextension, a collar secured to the tube and adjacent theinner end of said slot, and a cap secured on one end of the tube, saidcollar and cap being adapted to limit the longitjudinal movement of thesleeve upon the tu e.

6. A lead controllin mechanism for a pencil of the character escribedcomprising a tube adapted to contain a lead, a head member secured tothe tube, a sleeve rotatably mounted on the tube adjacent the headmember, said sleeve being adapted to support a rotatable pencil barrel,a collar on the tube adjacent the sleeve whereby longitudinal movementof the sleeve upon the tube is prevented, and means whereby rotation ofthe barrel and sleeve with relation to the head member will cause thelead to be pushed outwardly from the tube.`l

CHARLES f E. WEI-IN.

